src/gallium/drivers/ilo/core/ilo_state_sbe.h

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 2015 LunarG, Inc.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Chia-I Wu <olv@lunarg.com>
  26  */
  27
  28 #ifndef ILO_STATE_SBE_H
  29 #define ILO_STATE_SBE_H
  30
  31 #include "genhw/genhw.h"
  32
  33 #include "ilo_core.h"
  34 #include "ilo_dev.h"
  35
  36 /*
  37  * From the Sandy Bridge PRM, volume 2 part 1, page 264:
  38  *
  39  *     "Number of SF Output Attributes sets the number of attributes that will
  40  *      be output from the SF stage, not including position. This can be used
  41  *      to specify up to 32, and may differ from the number of input
  42  *      attributes."
  43  *
  44  *     "The first or last set of 16 attributes can be swizzled according to
  45  *      certain state fields."
  46  */
  47 #define ILO_STATE_SBE_MAX_ATTR_COUNT 32
  48 #define ILO_STATE_SBE_MAX_SWIZZLE_COUNT 16
  49
  50 struct ilo_state_sbe_swizzle_info {
  51    /* select an attribute from read ones */
  52    enum gen_inputattr_select attr_select;
  53    uint8_t attr;
  54
  55    bool force_zeros;
  56 };
  57
  58 struct ilo_state_sbe_info {
  59    uint8_t attr_count;
  60
  61    /* which VUE attributes to read */
  62    uint8_t cv_vue_attr_count;
  63    uint8_t vue_read_base;
  64    uint8_t vue_read_count;
  65    bool has_min_read_count;
  66
  67    bool cv_is_point;
  68    bool point_sprite_origin_lower_left;
  69    /* force sprite coordinates to the four corner vertices of the point */
  70    uint32_t point_sprite_enables;
  71
  72    /* force attr at the provoking vertex to a0 and zero to a1/a2 */
  73    uint32_t const_interp_enables;
  74
  75    bool swizzle_enable;
  76    /* swizzle attribute 16 to 31 instead; Gen7+ only */
  77    bool swizzle_16_31;
  78    uint8_t swizzle_count;
  79    const struct ilo_state_sbe_swizzle_info *swizzles;
  80 };
  81
  82 struct ilo_state_sbe {
  83    uint32_t sbe[3];
  84    uint32_t swiz[8];
  85 };
  86
  87 bool
  88 ilo_state_sbe_init(struct ilo_state_sbe *sbe,
  89                    const struct ilo_dev *dev,
  90                    const struct ilo_state_sbe_info *info);
  91
  92 bool
  93 ilo_state_sbe_init_for_rectlist(struct ilo_state_sbe *sbe,
  94                                 const struct ilo_dev *dev,
  95                                 uint8_t read_base,
  96                                 uint8_t read_count);
  97
  98 bool
  99 ilo_state_sbe_set_info(struct ilo_state_sbe *sbe,
 100                        const struct ilo_dev *dev,
 101                        const struct ilo_state_sbe_info *info);
 102
 103 #endif /* ILO_STATE_SBE_H */